John Bonnett Posted December 14, 2015 Share Posted December 14, 2015 I've always been very concerned by the risk of electrical fires on our cars so I've made a big effort to reduce the risk by fusing every single circuit and fitting relays wherever there are high current loadings. A friend over on the TSSC site has very kindly taken my amateurish drawings and transformed them into a professional circuit diagram as a pdf. If it would help anyone I'll be delighted to share it and if you drop me a PM I'll send it as an attachment. I'm not sure how useful this screen shot is but might give an idea of what I've done. Quote Link to comment Share on other sites More sharing options...
Anthony Posted December 14, 2015 Share Posted December 14, 2015 Most definitely of interest to me JohnCan you send it by PM or do you need me to send you my email address Quote Link to comment Share on other sites More sharing options...
John Bonnett Posted December 15, 2015 Author Share Posted December 15, 2015 Quoted from Anthony Most definitely of interest to me JohnCan you send it by PM or do you need me to send you my email address Drop me a PM with your email address Anthony and I'll send you the pdf.regardsJohn Quote Link to comment Share on other sites More sharing options...
Hogie Posted December 16, 2015 Share Posted December 16, 2015 Hi John, possibly not a good idea to have the headlights fused.Roger Quote Link to comment Share on other sites More sharing options...
John Bonnett Posted December 16, 2015 Author Share Posted December 16, 2015 Quoted from Hogie Hi John, possibly not a good idea to have the headlights fused.Roger I'd be interested in your reasons Roger. As far as I am aware it's standard practice to fuse headlights. I'm actually considering fitting in addition, 10 Amp in line fuses into each of the headlight feeds so that in the event of a short only one would go out. Quote Link to comment Share on other sites More sharing options...
piman Posted December 16, 2015 Share Posted December 16, 2015 Hello Roger," possibly not a good idea to have the headlights fused."Yes and no, a primary fuse before the relays needs to be over rated for the load, secondary fuses to each filament is what I prefer. The main factor that should be kept in mind is good installation practice to reduce the chance of a short to earth to near nil, grommets where passing through holes, edge sleeving or better still don't run over steel edges, clip the cables/harness firmly etc, common sense really. Quote Link to comment Share on other sites More sharing options...
Hogie Posted December 16, 2015 Share Posted December 16, 2015 Hi John, a well installed cable loom to the lights should prove faultless for many years.Fuses fail for willy nilly reasons as well as important one. Remove the cause of the important failure.Roger Quote Link to comment Share on other sites More sharing options...
rlubikey Posted December 16, 2015 Share Posted December 16, 2015 Fuse the headlamps individually. One fault won't take out all your lighting. You need duplicate cables (e.g. from another loom) so one for left headlamp, one for right, but you can do this as part of your program to beef up the headlamp wiring.Richard Quote Link to comment Share on other sites More sharing options...
Jonny-Jimbo Posted December 16, 2015 Share Posted December 16, 2015 It's well worth fusing whatever you can - when I first had my 2000, I found I was losing overdrive and a few other things. At first I thought a fuse went because it was an exceptionally wet day so water could have got up to the gearbox switches. But it then happened three times in a row on a dry day. I then found out that the overdrive wiring was going round the edge of the gearstick surround, not through it, Repaired the wire, drilled a hole and put a grommet in for the overdrive stick wiring. 5 years later, not had an issue with it. Better safe than sorry! Quote Link to comment Share on other sites More sharing options...
GT6 M Posted December 16, 2015 Share Posted December 16, 2015 I really should doo a full re wire on mine,there are loadsa new wires going every where, and all got their own fused link { inline }plus relays every where.thing is, I no whats what, but if i ever selt it, there be some serious head scratchin by new owner,as never made a wire diagram. and noo an then, I think, Wots this wire doo,! Butt, well done John, youve made a dia for to use with car.and for new owner to figure things oot easily.M Quote Link to comment Share on other sites More sharing options...
John Bonnett Posted December 16, 2015 Author Share Posted December 16, 2015 Good that the circuitry has stimulated some discussion and thank you for the valid points that have been raised. It just shows how easy it is to miss the obvious.I accept that a single fuse supplying the headlights could lead to a bad situation if it blew. So, my suggestion is to split the single feed to the main and dipped beam relays with the addition of another 25Amp fuse. This makes both main and dip independent and the loss of one will not take the other out as well. Or taking another step further duplicate circuits for left and right hand lamps could be included. Quote Link to comment Share on other sites More sharing options...
John Bonnett Posted December 16, 2015 Author Share Posted December 16, 2015 Quoted from Spitfire6 Hi, Sorry I forgot to say; Thanks for taking the time to draw and share.Cheers,Iain. Thank you Iain. My pleasure. But I've benefited as well so it's win win 🙂 Quote Link to comment Share on other sites More sharing options...
junkuser Posted December 16, 2015 Share Posted December 16, 2015 Early Fiat 500s from the 1930s/40s had two fuses for the lights.One for left front and right rear and one for the right front and left rear.At least better than many later cars.The early Holdens had no fuses at all from what I have read. Quote Link to comment Share on other sites More sharing options...
piman Posted December 17, 2015 Share Posted December 17, 2015 Hello all, just another point in view of what Marcus said, which is to use the correct colours for modifications, at least you then know what circuit a strange wire is connected to.50/60s Fords did not have fuses either. Chances of an earth fault should be virtually nil with a good installation.Alec Quote Link to comment Share on other sites More sharing options...
oil_on_the_carpet Posted December 18, 2015 Share Posted December 18, 2015 Quoted from Hogie Hi John, possibly not a good idea to have the headlights fused.Roger Really?The headlights in my moderns are fused Quote Link to comment Share on other sites More sharing options...
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